[pic] Cells and Their Organelles The cell is the basic unit of life. The following is a glossary of animal cell terms. All cells are surrounded by a cell membrane. The cell membrane is semipermeable‚ allowing some substances to pass into the cell and blocking others. It is composed of a double layer of phospholipids and embedded proteins. Color and label the cell membrane tan. Plant cells have an additional layer surrounding them called the cell wall. The cell wall is made of nonliving
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are important to understanding cell injury and cell death regardless of the injuring agent” (Heuther & McCance‚ 2012). Cellular injury arises when a cell is unable to sustain homeostasis. The injury can be reversed if the cell can recover from whatever damage was done but if it does not recover the cell will die. The three common forms of cell injury are hypoxic injury‚ free radicals and reactive oxygen species injury‚ and chemical injury. The most common form of cell injury is hypoxic injury‚ or
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Cell Theory In biology‚ cell theory is a scientific theory that describes the properties of cells‚ the basic unit of structure in every living thing. The initial development of the theory‚ during the mid-17th century‚ was made possible by advances in microscopy; the study of cells is called cell biology. Cell theory states that new cells are formed from pre-existing cells‚ and that the cell is a fundamental unit of structure‚ function and organization in all living organisms. It is one of the
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Diffusion and Osmosis of Solutes and Water Across a Membrane Brittany Bacallao Nova Southeastern University Abstract: This experiment gave a visual understanding of osmosis and diffusion. The first experiment proved that solutes would move down a concentration gradient if permeable to the selective membrane. The second experiment proved different solute concentrations affect the movement of water‚ depending on the solute concentration inside the cell. The purpose of this lab was to look for different
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for the description of all biological membranes • Transmembrane segments of membrane proteins anchor membrane proteins in the lipid bilayer. • A ganglioside is not a phospholipid. • Thin-layer chromatography separates lipids based on hydrophobicity. • Unsaturated fatty acids have double bonds and increased membrane fluidity. • Cholesterol increases fluidity at low temperatures and decreases fluidity at high temperatures. • Ankyrin is a peripheral membrane protein found in erythrocytes. Therefore
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World War II brought up many ethical issues. One of these was the ethical treatment of prisoners. As the Allied forces pushed into Nazi territory and came upon the concentration camps‚ the true horrors of World War II were seen. Dachau Concentration Camp in Southeast Germany‚ was the first of the concentration camps built by the Nationalsozialistische Deutsche Arbeiterpartei ‚ commonly referred to as the Nazi party. At the camp‚ the prisoners were forced to do hard labor and were unjustly executed
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things are composed of cells? Cell theory What type of microscope would be best for studying the detailed structure of the surface of a plasma membrane? Scanning electron microscope The two basic types of cells are ______ and ______. Prokaryotic . . . eukaryotic When using a light microscope to view a cell you obtained from scraping under your fingernails‚ you notice that the cell lacks a nucleus; therefore‚ you conclude that the cell must be a type of ______ cell. Prokaryotic One
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Cell Structure I. Cell History A. Anton Leewenhock (1600s) - first person to observe cells - in pond water‚ using a homemade microscope B. Robert Hooke (1665) - observed many kinds of animal tissue under a microscope - concludes that all animals are made up of cells C. Schwann (1868) - observed many kinds of animal tissue - concludes that all animals are made up of cells D. Schleiden (1869) - observed many kinds of plant tissue - concludes that all plants are made up of cells E. Cell
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Diana Rubene LS2B Abstract The chloroplast is most commonly recognized for its vital role in plant cells & protist cells as their main provider of energy. Within this review we are going to discuss what exactly is chloroplast what structures make up this complex & super efficient organelle which is so important not only to plants & protists‚ but also to us. How exactly does it absorb and use solar energy and use it to produce carbohydrates rich with energy that can be passed down the food chain‚
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___________________ Classification of Body Membranes Purpose: What is the purpose of this exercise? Is there any safety concerns associated with this exercise? If so‚ list what they are and what precautions should be taken. The purpose of this exercise is to be able to classify the membranes and learn about each. In this lab I will observe each membrane. Basically just getting to know each membrane better. Exercise 1: The Microscopic Structure of Cutaneous Membranes Observations: Draw your sketch
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